3. 633 Engineering Jazz & Blues £3,100

We’ve been drooling over 633 Engineering’s stuff for a while now. The fruit of the labours of ex-Blackstar designer Cliff Brown, the 45-watt single channel Jazz & Blues delivers classic American tones (via 5881 power and 12AX7 preamp tubes) through a single 12-inch speaker. At £3,000-plus the only thing more eye-watering is the 22kg weight – you definitely get what you pay for.